Li Wu:Heng Learn to think together, honouring teachers save Thanksgiving. Leaf See root three return to one, rivers the same oneness.Meekness Conscience Lord, willing to do without regrets to the most bitter. Reading exercises to keep the body and mind, sincere advice and the line and cherish.
Data,
data, Lingen on the data. You must be cautious about operating the database. Give the most bitter code here, and take a look at it, to have your own judgment. Meet the choice, or ashamed t
Label:As mentioned in the Oracle documentation, once the database is restored with a backed-up control file, the database needs to be opened using the Resetlogs method, but resetlogs usually means incomplete recovery and, more importantly, once the database is opened with the Resetlogs method, The serial number of the log is used again starting from 1. In fact, if only control file corruption, log files are complete, the database can be fully restored, and do not have to use resetlogs open. Next
Restart the Oracle database command and ALTER LOG today:[Email protected]:~> sqlplus '/as sysdba 'Sql*plus:release 11.2.0.3.0 Production on Wed Jan 27 18:49:13 2016Copyright (c) 1982, Oracle. All rights reserved.Connected to:Oracle Database 11g Enterprise Edition Release 11.2.0.3.0-64bit ProductionWith the partitioning, OLAP, Data Mining and Real application testing optionsSql>Sql>Sql>Sql>Sql>Sql>Sql>sql> shutdown immediate;Database closed.Database di
, you can infer whether the log is consistent2. Next, we need to stop the MRP process in the repository:ALTER DATABASE recover managed standby database cancel;Note that this assumes an error, such as the following see, can not care, because our main log is consistent, MRP can be idleERROR at line 1:ora-16136:managed Standby Recovery not active 3. We can then generate the data dictionary in the main libraryexec dbms_logstdby.build;we need to have the data dictionary transferred to the repository,
Label:Transferred from: http://blog.sina.com.cn/s/blog_63216bda0100zblr.html As mentioned in the Oracle documentation, once the database is restored with a backed-up control file, the database needs to be opened using the Resetlogs method, but resetlogs usually means incomplete recovery and, more importantly, once the database is opened with the Resetlogs method, The serial number of the log is used again starting from 1. In fact, if only control file corruption, log files are complete, the data
The ALTER TABLE statement is used to add, modify, or delete a column's original table in an existing table:first, Alter adds a new column to the table
syntax:ALTER TABLE table_name ADD COLUMN_NAME datatype
Note : Alter in SQLITE3 does not support the operation of deleting columns
Note :
The type of transformation used to display when modifying table field types.Original Description:SET DATA TYPEThis form changes the type of a column of a table. Indexes and simple table constraints involving the column Willbe automatically converted for use of the new column type by rep Arsing the originally supplied expression. The optional COLLATE clause specifies a collation for the new column; If omitted, the collation is the default for the new column type. The optional USING clause specifi
In general, the drop operation is not triggered if we alter the operation. However, in some special cases, the operation of ALTER package can see the drop operation in recursive SQL.
We have trigger in this environment, once there is a drop operation, it will be an error ORA-20008, and be blocked.
We see below, we're just alter package. But when it comes to the
In general, the drop operation is not triggered if we alter the operation. However, in some special cases, the operation of ALTER package can see the drop operation in recursive SQL.
We have trigger in this environment, once there is a drop operation, it will be an error ORA-20008, and be blocked.
We see below, we're just alter package. But when it comes to the
ALTER TABLE
The alter table statement is used to add and delete columns in an existing table.
ALTER TABLE table_name ADD column_name datatypeALTER TABLE table_name DROP COLUMN column_name
Note:Some database systems cannot delete columns in data tables (drop column column_name)
--------------------------------------------
Per
Format: Alter system | session set events '[eventnumber | immediate] Trace name eventname [forever] [, level levelnumber]:... 'Through the symbol, you can set multiple events consecutively, or you can use alter session set events consecutively to set multiple events.
Format description: eventnumber refers to the event number that triggers dump. The event number can be an oracle error number (the specified e
SQL> alter database drop logfile group 2;Alter database drop logfile Group 2*Error at line 1:ORA-01624: log 2 needed for crash recovery of instance dbstat (thread 1)ORA-00312: Online log 2 thread 1: '/data1/dbstat/redo2.log'
SQL> alter system switch logfile;
System altered.
SQL> select * from V $ log;
Group # thread # sequence # bytes members arc status first_cha
1. Find out which tables have incorrect tablespaces.
Select * From dba_tables where tablespace_name = 'tdb ';
2. Move the tablespace in TDB to tdb2009.
Syntax: alter table table_name move tablespace tablespace_name;
Alter table tdb2009.assoc _ INFO move tablespace tdb2009;Alter table tdb2009.bguserpopd move tablespace tdb2009;
Close
Select '
Add new fields to the table:
Alter table pro_producedailyitems add tiernum decimal (8, 2)
Add default values to existing fields:
Alter table pro_producedailyitems add constraint df_pro_producedailyitems_tiernum default 1 for tiernum
Add a foreign key:
Alter table ssd_iinwhrecord add constraint fk_ssd_iinwhrecord_pro_producedailyt foreign key (cbedcode) Refer
The MySQL Replication encountered the following error message: (mysql> show slave status\g # simplified message below)
last_errno:1580Last_error:error ' You cannot ' ALTER ' a log table if logging are enabled ' on query. Default database: ' MySQL '. Query: ' ALTERTABLE Slow_log ...last_sql_errno:1580Last_sql_error:error ' You cannot ' ALTER ' a log table if logging are enabled ' on query. Default database:
ALTER DATABASE Create datafile causes the original data file to be lost
We have a client with a small system to recover, after Oracle Database Recovery Check detection We found a strange phenomenon in the Red box section
1. The head of the file is fuzzy No, does not conform to the database unusual crash common sense, also and other files this state does not match
2. File creation time, SCN and checkpoint time, SCN consistent (that
use the ALTER USER command to modify the user's password, password expiration, lock, unlock
(1) Modify the user's password and change the user's password to a new password
highgo= #create user test with password ' test ';
Createrole
highgo= #select usename,passwd from Pg_shadow;
Usename | passwd
---------+-------------------------------------
Highgo | md5614aeb636ab143b790547ce463ec1741
A | md5039af99d1e9a4b194e0eb800a6f8d018
B | Md583aeaa4e529325e23
The ALTER table statement is used to add, modify, or delete columns in an existing table.Persons table:
Id
LastName
FirstName
Address
City
1
Adams
John
Oxford Street
London
2
Bush
George
Fifth Avenue
New York
3
Carter
Thomas
Changan Street
Beijing
Now, we want to add a new column named "Birthday" in th
Label:a), First of all, let's say the error phenomenon: Most of the popular Ecshop templates on the market need to execute a paragraph or a few SQL statements to modify the data structure or initialize some of it. Most Ecshop administrators will execute these SQL statements through the Ecshop backend database management SQL query for the sake of convenience. The problem is that when you paste into the SQL statement and click "Submit Query", the system will report the following error: This SQL ma
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